FIELD: fire protection.
SUBSTANCE: group of inventions relates to the field of fire safety, namely to modern means of control and prevention of fires at an early stage by constant local, point monitoring of temperatures or overheating of electrical wiring, contact groups, terminals, equipment and various objects through the use of chemical indicators of a combined principle of action that change their color and emit odor when exposed to temperature. Thermochromic nanocapsule material used to generate a signal about local overheating of electrical equipment by simultaneously releasing an odorant and changing the color of the material with increasing temperature includes nanocapsules containing a core located inside a shell of polymer material with an odorant. The material consists of nanocapsules distributed in a polymer binder with a thermochromic substance core located in a multilayer modified polymer shell containing a layer with an odorant and a protective flame retardant layer, with the following component ratio, wt. %: a thermochromic substance core 84-88, a polymer shell 5-7, a plasticizer 3-5, an odorant layer 2-3, a protective fire retardant layer 2-3. Nanocapsules have an activation temperature range of 50-250°C. The outer diameter of the nanocapsules is 40-60 microns. The average thickness of the odorant layer is 2-3 microns. The average thickness of the protective fire retardant layer is 2-3 mcm. To obtain a thermochromic nanocapsule material, the thermochromic substance is crushed, sieved and separated to a homogeneous fine fraction of 30-50 mcm. A mixture of polymer and plasticizer is prepared, divided into parts, a mixture with odorant and a mixture with nanocomposites are prepared, which are then fed into separate tanks of the dosing unit. A polymer hardener is loaded into a separate tank of the dosing unit. The resulting thermochromic substance is electrified with static electricity and loaded into the layer deposition chamber. They are sprayed with dry compressed air and a mixture of polymer and odorant is supplied. At the end of the spraying cycle, the raw material coated with the formed layer of the uncured shell is deposited in the reaction chamber and the hardener is sprayed and the polymer is cured. The resulting raw materials are reversed from the reaction chamber to the layer deposition chamber and a mixture of the said polymer and nanocomposite is sprayed. At the end of the spraying cycle, the raw material coated with the next layer of the uncured shell is deposited from the spray chamber of the layer into the reaction chamber. Spraying of the hardener and curing of the polymer are carried out. At the end of the cycles of spraying the layers and curing the shells, the finished material is obtained, which is unloaded into a technological container, sorted and packed into transport containers. The thermochromic nanocapsule product is made in the form of a structural product and contains the thermochromic nanocapsule material described above.
EFFECT: increase in the flowability of the material, an increase in the long-term storage time while maintaining the original properties, an increase in uniformity, chemical resistance and uniformity of mixing in polymer compositions, resistance to aggressive media/solvents and stabilization of the activation temperature is provided.
10 cl, 8 dwg, 5 tbl
